Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor

Definitions

• the present invention relates to the field of sachets comprising complementary closure profiles actuated respectively on opening and closing by a slider.
• the object of the present invention is to improve this field.
• a bag comprising complementary closure profiles actuated respectively at the opening and at the closing by a slider, characterized in that it comprises a wall portion of the bag forming a veil liable to rupture covering the cursor before using the sachet.
• the present invention thus makes it possible, by simple means, to prohibit access to the cursor while the covering veil is in place.
• FIG. 1 shows a view similar to Figure 1 of a bag according to an alternative embodiment of the present invention.
• a bag 10 made up of two parallel walls 12, 14 defining a bag mouth 16.
• such a sachet can be formed according to numerous arrangements known to those skilled in the art.
• the two walls 12, 14 of the bag can be formed from a common sheet folded back on itself in the form of two generally parallel flaps corresponding to said walls 12, 14 and fixed together at their level. periphery, on three sides, for example by gluing or thermal welding.
• the mouth 16, which preferably corresponds to a bonding zone by bonding or thermal welding between the two walls 12, 14 may be parallel and opposite to the fold line of the sheet, or perpendicular to this line of folding (in which case the bottom 19 of the bag is also formed by gluing or welding the two flaps 12, 14 as illustrated in a nonlimiting manner in FIG. 1).
• the two walls 12, 14 can be formed from two initially separate sheets, generally parallel to one another and fixed on their periphery, on four sides, for example by gluing or thermal welding as indicated above.
• the bags according to the present invention are equipped with complementary closure profiles 20, 30 actuated by a slider 40. These means can be the subject of numerous embodiments known in themselves.
• the complementary closure profiles 20, 30 can be formed of complementary structures of the male / female type respectively, or of complementary hook structures.
• cursor 40 The same is true for cursor 40.
• the cursor 40 can in particular conform to the provisions described in document EP-A-0479661.
• the slider 40 made of plastic material, comprises two lateral wings connected to each other at the level of a base and which define, with an elongated central sole, two converging passageways for the profiles of complementary closure nestable 20, 30.
• the slider 40 made of plastic material, comprises two lateral wings connected to each other at the level of a base and which define, with an elongated central sole, two converging passageways for the profiles of complementary closure nestable 20, 30.
• the film or films making up the walls 12, 14 of the bag can be the subject of numerous embodiments. It is preferably a plastic film, very preferably polyolefin, very advantageously low or high density polyethylene or even polypropylene. However, the invention is not limited to these particular materials.
• the invention also applies to sachets made from composite material, such as sheet based on plasticized or metallized paper, etc.
• the complementary profiles 20, 30 are carried by respective support webs 22, 32 fixed to the walls of the bag as will be described later.
• the first one 22 of these support webs is fixed to the internal surface 13 of a wall 12 at a distance from the weld 17 defining the mouth 16.
• the connection zone between the support web 22 and the wall 12 is illustrated under the general reference 24.
• This connection zone can be defined by bonding or thermal welding between the internal surface 13 of the wall 12 and the support web 22. If necessary, as is known to those skilled in the art, this connecting zone 24 can be defined for example by welding thermal ribs from extrusion on the support web 22 and / or on the wall 12.
• the second support web 32 is sandwiched between the two walls 12, 14 at the mouth 16, and fixed thereon at the weld 17.
• connection 17a is thus defined between a first face of the support fabric 32 and the wall 12, and a second connection 17b between the second face of the support fabric 32 and the second wall 14.
• connection thus defined between the support fabric 32 and the walls 12, 14 can be produced using conventional thermal welding jaws generally. used to ensure the closure of a bag, at the mouth thereof, by direct connection between the walls 12, 14 of the bag according to the conventional technique.
• thermal welding jaws are referenced 100, 110 in FIG. 1.
• the user can freely and conventionally access the cursor 40 in order to open or close the bag, respectively, by separation or nesting of the sections 20, 30.
• the aforementioned portion of the wall 12 may be provided with a line of weakness 11 extending parallel to the connections 24, 17a, to facilitate the opening of this portion of the wall.
• the length L1 of the aforementioned portion of wall 12 situated between the aforementioned connecting zones 24 and 17a is less than the sum of the corresponding lengths L2 and L3 support fabrics 22, 32 located between the connection zones 24 and 17a.
• this geometrical condition makes it easier to access the cursor 40 and the profiles 20, 30 at the opening 11 made in the wall portion 12 located between the connection zones. 24 and 17a, after rupture of this wall portion. This access is shown diagrammatically in FIG. 2.
• the sachets illustrated in FIG. 1 are produced on machines of the FFS (Form, Fill and Seal) type, that is to say machines designed to automatically carry out operations for forming, filling and closing sachets.
• FFS Form, Fill and Seal
• the general structure of these machines known per se will not be described in detail below.
• FFS machines generally include a forming neck which receives the film in the plane state from an unwinder and provides the film-shaped tube at the outlet, a filling chute which opens into this neck. forming means and consequently in said tube, means for conveying closure profiles and for fixing them on the film, longitudinal welding means for closing the tube longitudinally and means capable of sequentially generating a first transverse weld before 'a product is not introduced into the tube through the filler neck, then a second transverse seal when the product has been introduced into the tube, to close a package around the latter.
• the support webs 22, 32 carrying the closure sections 20, 30 and the slider 40 are preferably conveyed on the film transversely to the direction of movement thereof and this in upstream of the forming neck. More precisely, according to this embodiment, the support web 22 is fixed to the film 12 at the level of the connection zone 24, using appropriate means, in particular jaws with thermal welding, upstream from the forming neck, while the second support veil 32 is fixed to the walls 12, 14, at the level of the connection zone 17, using the welding jaws 100, 110 establishing the transverse welding called "second" previously.
• the invention is not limited to the arrangement of the support webs 22, 32 transversely to the direction of advance of the film.
• the invention can also find application with a routing of the support webs 22, 32 and their closing profile 20, 30 and associated cursor 40, longitudinally, that is to say parallel to the direction of advance of the aforementioned film.
• the support webs 22, 32 are fixed on the walls 12, 14 no longer using transverse welding jaws, but using longitudinal jaws, that is to say jaws located in parallel to the direction of the forming neck, for example the conventional jaws per se used to close the tube obtained longitudinally at the outlet of the forming neck.
• connection zones 17, 24 can be produced simultaneously and not point successively as has been described previously for a transverse deposition respectively upstream and downstream of the forming neck.
• one of the support webs (here that referenced 32 located on the side of the mouth 16) is formed of two sections 32a, 32b, one 32a located side mouth 16 and fixed to the walls 12, 14 at the areas 17a, 17b as described above, and the other 32b located on the profile side 30, the two sections 32a, 32b forming a dihedral with a concavity directed towards the outside, either towards the wall 12.
• the two sections 32a, 32b can be formed of initially separate elements connected to each other by bonding or by thermal welding at the level of the apex 33 of the aforementioned dihedral or even be formed of a single folded element on itself at a sharp angle at this vertex 33.
• the use of a portion of wall covering the cursor at the origin makes it possible to solve in a simple manner the sealing problems generally encountered on sachets equipped with closure profiles actuated by cursor.
• the support webs 22, 32 and / or closure profiles 20, 30 and / or slider can be provided with numerous provisions aimed at sealing, in particular those defined by the Applicant in its patent applications FR 98 16236, FR 98 13732, FR 98 13734, FR 98 05681.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bag Frames (AREA)
• Making Paper Articles (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9544901

Family Applications (1)

Country Status (10)

Cited By (2)

Families Citing this family (17)

Family Cites Families (19)

• 1999
  • 1999-04-27 FR FR9905303A patent/FR2792812B1/fr not_active Expired - Fee Related
• 2000
  • 2000-04-25 AU AU43032/00A patent/AU769466B2/en not_active Ceased
  • 2000-04-25 EP EP00922733A patent/EP1091883B1/de not_active Expired - Lifetime
  • 2000-04-25 CA CA002336177A patent/CA2336177C/fr not_active Expired - Fee Related
  • 2000-04-25 WO PCT/FR2000/001082 patent/WO2000064765A1/fr active IP Right Grant
  • 2000-04-25 US US09/719,557 patent/US6402376B1/en not_active Expired - Fee Related
  • 2000-04-25 NZ NZ508891A patent/NZ508891A/xx unknown
  • 2000-04-25 DE DE60005453T patent/DE60005453T2/de not_active Expired - Lifetime
  • 2000-04-25 AT AT00922733T patent/ATE250538T1/de not_active IP Right Cessation
  • 2000-04-25 BR BRPI0006083-6A patent/BR0006083B1/pt not_active IP Right Cessation

Non-Patent Citations (1)

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